Testing of Mixed Flow Vertical Turbine Pump

International Research Journal of Engineering and Technology (IRJET)

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Volume: 09 Issue: 02 | Feb 2022

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Testing of Mixed Flow Vertical Turbine Pump Sunil Patil1 1M.E.

Student (Design Engineering), Department of Mechanical Engineering, Annasaheb Dange College of Enginnering and Technology, Astha, Maharashtra-416301, India ---------------------------------------------------------------------***----------------------------------------------------------------------

Abstract - Centrifugal pumps is a mechanical device that is

controlling valve and flow meter was placed in between piping for measuring the flow of the pump. All necessary instruments like RTD, Digital Flow meter, tacho meter was installed on pump for taking reading of pump during pump operation.

used to deliver liquid by converting the rotary kinetic energy of liquid flow into dynamic energy. The motor or turbine is used to deliver rotary energy. normally the liquid enter through the impeller from to rotating axis and the impeller accelerate the liquid to outward radially to diffuser or casing through which the liquid exist. The impeller used in centrifugal pumps are made from Aluminum or Steel. The centrifugal is designed using Computer Aided Design (CAD) software by using various metal alloys and Non-Metallic by testing its to check the composite materials, strength and deformation analyze by simulation software. Centrifugal pumps are a subtype of dynamic axis symmetric work absorbing turbo machinery. The reverse function of the centrifugal pump is a water turbine converting the Potential Energy of water pressure into mechanical rotatory energy.

Key Words: Centrifugal Pump, Vertical Turbine Pump, Performance Testing, Proto type Pump Testing,

1. INTRODUCTION a) Front view of testing arrangement of pump

This paper is a part of my ME Dissertation work, In that I took testing part of pump from dissertation work. Kirloskar Brothers Limited, Kirloskarvadi where Performance testing is completed at HRC (Hydraulic Research Center). The test facility built under the guidance and of British Hydraulic Research Association. Test is carried out for power absorbed, efficiency, Discharge, and Head. During pump testing Noise level and vibration level of the pump is recorded. There are 4 test beds which has a depth of 7.5 m. for the discharge and flow we use butter butterfly valve for pumps testing in each well. With the help of short intermediate pipes between flange of discharge and butterfly valve with reduction ratios and diameters checking the flexibility of pump testing discharge flange connected to the butterfly valves. Only Pump unit will be tested. Standard Column pipes and Discharge Head of required size will be used from HRC for testing purpose only. The liquid used in testing will be water at ambient temperature.

1.1 Testing Arrangement of VT Pump Test bed used for testing was decided based on discharge of pump and total head developed in the pump. According to the discharge of pump and head test bed selected. Line shaft pump has to be selected for design to study. Setup of motor used to drive the pump. Reduced suspension length pump was placed on test bed for testing. Accordingly, further piping

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b) Side view of testing arrangement of Pump

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International Research Journal of Engineering and Technology (IRJET)

e-ISSN: 2395-0056

Volume: 09 Issue: 02 | Feb 2022

p-ISSN: 2395-0072

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Vibration meter

Digital Temp Gun

2. Observations and Sample CalculationTotal six readings are taken from zero discharge i.e. closed valve condition to maximum discharge of the pump. Specific gravity is considering 1.0 because pumping liquid is water.

Table shows the observations during pump testing at specific gravity of 1.0.

Test-Rig Layout for Mixed Flow Vertical Turbine Pump.

1.2 Instruments used for Performance Testing-

Test Conditions-

The instruments used during tests are periodically calibrated from NABL laboratory. The read the data input and output of real value is taken from calibration result, which is stated in calibration report. The details of instruments used in testing are as follows.

Discharge Measurement: The discharge is measured by sharp crested rectangular weir.

Atmospheric pressure (mlc) = 9.70 m Water temperature = 26.50 C Bearing temperature after test = 36.50 C Bearing temperature rise =110 C

Head Measurement: Delivery head is measured by delivery pressure transducer mounted on the delivery pipeline.

Duration of pump running = 60 minutes.

Power Input Measurement: The power input is measured by power meter.

Pump output

= (Total Head x Discharge x sp. Gravity) 102

Measurement of Speed: A digital tachometer is used to measure the speed. It gives the direct reading in rpm.

= (20.50x611.1x1.00) 102

Vibration Measurement: Vibration is measured as per Hydraulic institute standard by ‘Vibration meter’ at thrust bearing housing and motor and motor stool holding joint.

= 122.82 kW Pump efficiency = (Pump Output) X 100 (Pump Input) = 122.82 X 100 140.35

=87.5 %

Digital Tachometer

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Digital sound level meter

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International Research Journal of Engineering and Technology (IRJET)

e-ISSN: 2395-0056

Volume: 09 Issue: 02 | Feb 2022

p-ISSN: 2395-0072

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Table -1: Observation Table of Pump Testing

Total Head = 0.47+18.70+1.20+0.128 = 20.50 m

Reading No.

Pump Flow (lps)

Motor Speed (rpm)

Efficiency (n %)

Power (kW)

1

0

983

0

148.40

2

277.8

985

51.50

132.72

= 147.74 X 0.95

3

444.4

983

73.50

138.13

= 140.35 kW

4

611.1

984

87.50

147.74

5

680.6

984

82.50

138.29

6

750

985

66.80

123.28

Reading No.

Motor Input = 147.74 kW Pump input = Motor Input x Motor efficiency

Pump output = (Total Head x Discharge x Sp. Gravity) 102 = (20.25 x 611.11 x 1.0)

Head (mtr) *WL to GL Distance (mtr)

Transducer reading (mlc)

Del. Gauge (mlc)

Velocity Head

Total Head

1

0.27

28.53

1.2

0

30.0

2

0.37

23.49

1.2

0.026

25.09

3

0.4

21.66

1.2

0.067

23.33

4

0.47

18.70

1.2

0.128

20.50

5

0.48

15.26

1.2

0.16

17.10

6

0.5

9.31

1.2

0.19

11.20

102 = 122.82 kW Pump efficiency =

Pump Output

X 100

Pump Input Pump Efficiency = (122.82) x 100 140.35 = 87.5 % Noise Measurement: Noise is be measured by ‘sound level meter’. Noise level recorded at a distance of 1.0 m from the pump set is 85 dBA.

NOTE: -WL - WATER LEVEL, GL-GROUND LEVEL Sample Calculation-

Vibration Measurement:

Taking Reading No: 4 for sample calculation it is (Close to Duty Point)

Vibration is measured as per Hydraulic institute standard (HIS 14.6) by ‘Vibration meter’ at thrust bearing housing and motor and motor stool holding joint. Recorded values at motor and motor stool holding joint are as follows.

Speed measured = 984 rpm Discharge (Capacity) = 611.11 lps (Converted flow meter reading)

X =3.8 mm/sec, Y=4.2 mm/sec, Z= 4.3 mm/sec.

After experimental test and reading calculations characteristics performance curve is plotted for as per the test readings. Figure 5.4 shows the tested performance curve

Total head = Water level to ground level distance + Delivery gauge reading (Transducer reading) + Delivery Gauge position with respect to ground + Velocity head correction. a)

Water level to Ground level distance – 0.47 m.

b) Delivery gauge reading – 18.13 m c)

Delivery Gauge position with respect o ground – 1.20 m

Velocity head correction is calculated as follows.

Velocity head correction, (V2)

= (Q) 2 x c’

2g

= (611.11)2 x 0.0000003440

Performance Curve of Tested Pump

CONCLUSIONS

= 0.128 m

Pump Performance test is taken at pump test lab of Kirloskar Brothers limited factory. These observation readings are used to plot performance characteristic cure. The tested

Where- Q – in Ips C’ – 0.0000003440 is constant multiplier for calculations.

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Volume: 09 Issue: 02 | Feb 2022

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performance curve is very well matched with required performance curve.

ACKNOWLEDGEMENT The work is a part of project program supported by Kirloskar Brothers Limited, Kirloskarwadi Ebara Pumps Ltd, Kirloskarwadi, India. Authors would like to thank Mr. Chidambar Deshpande for their valuable support.

REFERENCES [1] [2]

[3] [4] [5] [6]

[7] [8]

[9] [10]

Charles M. Burt, “Improving Pump Performance”, IA Technical Conference — Anaheim, CA. (2008).

H Chen, W Liu, W Jian, and P Wei, “Impellers of Low Specific Speed Centrifugal Pump Based on Draughting Technology”, 25th IAHR Symposium on Hydraulic Machinery & Systems. IOP Publishing World Pumps, “Advance Design Software for Pumps”, www.worldpumps.com (2007) Kirloskar Brothers Limited, “Rotodymanic Pumps”, Engineering Data Book.

Ed Butts, “Vertical Turbine Pumps: Basic Design Features”, Water Well Journal (2003) American National Standard for Vertical Pump for Nomenclature and Definitions (ANSI/HI 2.1-2.2-2000), Hydraulic Institute Kirloskar Brothers Limited, “Kirloskar Vertical Pump”, Vertical Turbine Product Catalogue Personal communication with engineers from Product Engineering Division, Pump testing lab, Manufacturing Department, assembly shop of Vertical Turbine Pump.

“American National Standard for Vertical Pumps for Nomenclature and Definitions”, ANSI/HIS 2.1-2.2, 2000 “American National Standard for Centrifugal Pump Tests”, ANSI/HIS 1.6, 2000

BIOGRAPHIES Mr. Sunil S. Patil received BE in Mechanical Engineering in 2008 from Rajarambapu Institute of Technology, Islampur. He is having total 10+ years of industrial experience.

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